Bicyclist&#39;s helmet



FIG. 1 is a side elevational view of a bicyclist's helmet showing my newdesign, the opposite side being a mirror image thereof;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof.

The ornamental design for a bicyclist's helmet, as shown and described.